Versatile Ion‐Gel Fibrous Membrane for Energy‐Harvesting Iontronic Skin

Abstract

Developing versatile and high sensitivity sensors is beneficial for promoting flexible electronic devices and human‐machine interactive systems. Researchers are working on the exploration of various active sensing materials toward broad detection, multifunction, and low‐power consumption. Here, a versatile ion‐gel fibrous membrane is presented by electrospinning technology and utilized to construct capacitive sensors and triboelectric nanogenerator (TENG). The iontronic capacitive sensor exhibits inherently favorable sensitivity and repeatability, which retains long‐term stability after 5000 cycles. The capacitive sensor can also detect a clear pulse waveform at the human wrist and enable the mapping of pressure distribution by a capacitive sensory matrix. For the iontronic TENG, the maximum peak power is 54.56 µW and can be used to power commercial electronics. In addition, the prepared iontronic TENG array can achieve interactive, rapidly responsive, and accurate dynamic monitoring, which broadens the exploration to direct and effective sensory devices. The versatile ion‐gel fibrous membrane is promising to provide an outstanding approach for physiological detection, biomechanical energy harvesting, human‐machine interaction, and self‐powered monitoring systems.

Material selection and performance optimization strategies for a wearable friction nanogenerator (W-TENG)

“…A common method of physical modification is to increase the surface area of the material and enhance the interface effect or surface roughness via the introduction of nanostructures. 194,195…”

Pursuing Superhydrophobic Flexible Strain Sensors: From Design to Applications

“…Challenges and opportunities coexist; the field of superhydrophobic strain sensors is brimming with potential, and future research efforts will continue to drive its advancement. The potential of combining superhydrophobic technology with various sensor types (e.g., conventional capacitive, [ 173 ] iontronic interfacial capacitive, [ 174,175 ] piezoelectric, [ 176,177 ] triboelectric, [ 178,179 ] multimodal sensors [ 180–182 ] ) is highlighted as a promising direction for future research and innovation to develop more powerful and versatile sensing systems. Further, through ongoing innovation and interdisciplinary collaboration, we expect exciting breakthroughs in materials science, sensing technology, and engineering, which will offer greater convenience and possibilities for society and technology.…”

Liquid-free ionic conductive elastomers with high mechanical properties and ionic conductivity for multifunctional sensors and triboelectric nanogenerators

“…7(b)). 12,64,65 When pressure is applied, the positive and negative triboelectric layers come into contact and opposite charges are generated at the interface due to the different electron affinities of the two materials (Fig. 7(b-i)).…”